I got some awesome postcards printed from Vistaprint. I originally used them to get business cards, and decided to risk it despite their awful reviews, but my business cards arrived and I was happy with them. So I thought I'd go for some postcards, and the quality of these glossy ones is above what I expected. The postcards feature the monster wolf I illustrated for The Problem.
I'm going to be giving one away free with every Folksy and Etsy sale for a while, and with every sale of The Problem until I run out of them! :) If you'd like to buy just the postcards, they are 50p each plus postage, get in touch if interested!